Whatsapp Calling Integration

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rcksl

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Apr 6, 2025
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I think it is now possible to integrate WhatsApp calling with FusionPBX and bridge whatsapp calls to a Registered SIP Client.

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Have anyone tried this? what are the challenges?
 
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here is a good article, he does use asterisk but easy to change and adapt
nimblea.pe

WhatsApp Business Calling with SIP

For years, WhatsApp has been one of the most popular apps where people message their friends, family, and increasingly, businesses. But with Business Calling, WhatsApp is now bridging into voice - and doing it in a way that connects straight into your existing telephony setup.
nimblea.pe nimblea.pe
 
Yes, I have setup Whatsapp calling for our fusionpbx clients using opensips as proxy server and rtpengine for media transcoding below is my call flow.
Whatsapp-Meta -> Opensips-Box + Rtpengine -> FusionPBX Server.
 
Hello @rcksl, I set this up myself, as there isn’t any official documentation available yet for configuring WhatsApp calls on FusionPBX. To make this work, you must have a Verified Meta Business account and an API token to configure inbound calls to your proxy server. Additionally, Meta only allows TLS for signaling and SDES/DTLS for media negotiation.

I’ve attached a snapshot showing the proxy server setup.
 

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Hi @Hamza.962 I have a verified a business but the number is pending on meta. I received the verification code to the mobile number and entered in the verification but still it's pending.. Am I doing anything wrong in verification? is there something to do with a certificate? have you done such thing?
 
Hello @rcksl, I believe Meta requires certain documents to verify a business, and the verification process can take some time. I haven’t completed this step personally, as I usually receive the authorization token directly from my clients to route calls to the proxy server.
 
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